Crushing-mill.



H. L. KENT.

CBUSHING MILL.

APPLICATION FILED JULY l0. 1912.

atented Aug. 24, 1915.

2 SHEETS-SHEET I.

"URY H. L. KENT.

CRUSHING MILL.

.PPLICATIOM FILED JULY lo. 1912.

Patented Aug. 24, 1915.

2 SHEETS-SHEET 2.

a@ l A pedite the screen-ing action and prevent .Hamon L. KENT, or encourir, New Yoan. I

CBUSHINGf-MILL.

Be it lknown that I, HORACE L. KENT, a citizen of the' United States, and residing in Brooklyn, in thecounty of Kings and' State of New` York, have invented certain ,new and useful Improvements in Crushing- Mills, of which the following is a full and clear specification.` I j This invention relates to crushing mills'. for pulverizing various substances and has for its main general object to provide' an improved construction, combination and arrangement of parts in that type of roll mills in which the rolls are swingingly suspendedv from a rotary driving head.

One of the objects of the present invention is to provide a grinding mortar of improved construction, and a roll which co operates with said mortar without slip at Aany point.

Another object is to provide improved means for mounting and supporting the grinding mortar for the purpose-of eliminating-crystallization of the metals in certain parts which are peculiarly subject to crystallization, such` as the rollv shaft, bearing head, and parts fof the framework contiguous thereto. y

A further object is to provide an improved construction Whichz will serve to ex- TQ all whom z'tpmay concern.'

clogging thereby greatlyA increasing the ca- I pacity of the mill. a

nother object is to provide a rotary head of improved construction andI improved means for flexibly mounting said rotary head'irom which thecrushing rollrs suspended, said iexible mounting contemplating the equalization of the stresses in a bearing support comprising relativelyadjustable arts.

p Other and further objects will appear in the specification and be specifically pointed out in the appended claims, reference being had to the accompanying drawings,.exern plifying the invention and in which,

Figure l is a vertical section. ci a crushing mill constructed 1n accordance wlth the principles of the present invention, parts bcing broken away and parts shown iny elevation; Fig. 2 is a top plan View of the same with the top cap removed; Fig, 3 is atop plan view withvthe rotary head removed,

- parts being broken away; F ig. 4 is a top plan view of the grinding mortar detached and with the housing'and screen removed,`

-speemeation of Letters Patent. j

v.the drop frame and a 6fragment of the base ring being shown.

5 Patenten aug. 24j, reis. Appncaaon mea July 10,'19'12. senalnevoaaae. Y

Referring more particularlytothe drawi pending fromthe base `ring 2 is an arched drop frame 3, vprovided with a hub 4 in which is adjustably mounted a post 5, said post being held in any position to which it may be adjusted byl means of a set screw 6. yThe upper end of the post 5 is rounded to fit the curved socket in the under face of a bearing block 7 which is socketed within a depending protuberance 8 on the bottom of the mortar 9. Said mortar is provided The inner walls ofthe with a grinding ring 10, whichis-removably f tween the roll 1l and ring 10 and to make the movement a purely rolling one, the roll lland ring 10 are'respectively constructed to conform to the surfaces of a cone rolling within a cone and having a common apex at the center of the spherical journal in the rotary bearing head. In this manner, true rolling Contact is provided between the upper edgesv of the roll and ring as well as between the lower edges thereof. The lat- A eral walls of the mortartare made with inner and outer sections spaced apart to provide annular passages 13 across the upper ends of which extend the upwardly flared screen 1d, which is thus adapted to l deliver the screened material vertically by .gravity and at the same time having its inner wall forming a hopper like wall for 'greatly extending the screening action.-

for the apparatus just described For making the partsl readily accessible A 15, being sur-mounted by` a frusto-conical mortar when the nuts 19 which retain the' cap plate 16 in position on the bolts 20, are removed. The upper ends of the supports 1, are rigidly connected by a ring 21 provided with an angular recess 21 for ythe purpose of adjustably mounting the bearing ring 22, provided with sockets 23 for thev radially disposed springs 24, which abut at their 'outer-ends against the disk plates 25 on the inner ends of bolts 26, which are threaded in the upper ends ot' the supports 1 and serve to adjust the tension of the springs 24 and so determine the normal position of the ring 22. The inner face of jthe ring 22 is provided with a concave bearing surface within which the upper convex portion of a connection 27 is socketed. The lower portion of the connection 27 is threaded eXteriorly to receive a gland 28,

provided on its lower end with an inwardly j turned flange 29 for supporting the bearing Washers 30, which are usually made of suitable metals for this purpose. A bearing cone 31 is provided below with a flat annulus 32, with an upwardly deflected flange 33, which is threaded to the outer wall of the gland 28. The rotary head for operating the roll is journaled upon cone 31, and in its main essential elements comprises the pulley rim 34, which is connected by web 35 with a rusto-conical bearing hub- 3G. Surlmounting the bearing hub' 36 is a part spherical bearing member 37. As shown in Figs. 1 and 2, the rotary head is provided with a receptacle for lubricant consisting of a cylindrical hub portion 38, and a pair of oppositely disposed roller sockets 39. Uni-- vel-sally journaled upon the ball pivot 37 is a part spherical socket or bearing cap` 40, from the lower edge of which projects the bearing pins or journals 41 for the rollers 42, which bear on the side walls of sockets 39, and serve to permit the desired swinging and revolving movements of thel roll supporting shaft 12, which is rigidly connected to the bearing socket 40. The roll 11 is rigidly mounted on the lower end of the shaft 12 and as already pointed out, is made of truste-conical form to correspond to its revolving mbvements and its relative 'disposition with respect to the rotary head.

By an inspection of Fig. 1 it will .be seenl that the overhanging upper edge of-V the grinding ring 10 coperates with the frustoconical form yofthe roll 11 to prevent said roll beingl crowded upwardly during the pulverizing operations, thus making the pulverizing action more positive.

In'order toprovidelslmple and eiicient means whereby the supporting'ring 22 ,may

be caused to slide on the annular shoulder formed by the recess 21, an additional means for supporting the bearingcone 31 is provided by the plate ring 43, which" is recessed as shown in Fig. 1, to seat the iiat base portion 32 of the bearingcone 31. The ring 43 is suspended .by means' of bolts 44 which permit a universalswinging movement of suiiicient scope to provide for the resiliently supported vibratory movement of the rotary driving head. For this purpose, the supports 1 are provided with lugs 45 with downwardly enlarged apertures, j which permit the necessary swing of the bolts 44. In order to adapt the bolts 44 for their rocking movements, a cupped washer v46 1s interposed between the head of each bolt andthe top surface of the lug upon which it rests. Threaded to the bolts 44 are nuts 47, which serve to impart a vertical adjustment to the bearing ring .43 to adjust the stresses in the rings 22 and 43 for the purpose of preventing any injurious grinding action ot the ring 22 against the surface on which it slides.

As is well known, the. constant jar and impact. between metals ot the description usedv in machines rof this-character eventually causes crystallization and consequent liability of the pa rts breaking under the shocks to which said machine is subjected. To avoid these diiiiculties, the present invenvtion contemplates Vthe' support of the mortar from the centrally disposed post 5, such that said mortar can be rocked under proper restraint in every direction from the pivot 5. To properly restrain the movements of the mortar 9, the outer lateral wall of the moi'- tar 9 is provided with a plurality of sockets 48, for the retention of springs 49, each bearing on their outer ends against li disk plate 50 on the inner end ot an adjustment bolt 51, threaded in boss 52, on the base ring 2. In this manner crystallization of the roll shaft bearing head and contiguous parts is very largelyprevented and the lite of the parts greatly extended, as the hard jolts and knocks are largely absorbed by the springs 49. Cooperating with this yielding movement of the mortar 9 the yieldable mounting of the rotary head, as hereinbefore described, permits the ready and continuous for ythe supplementary supporting ring 43,

makes it possible to prevent any undesirable grinding effects of the ring 22 on the annu lar bearing surface formed by the recess 21.

lVhat I claim is:

1. In a crushing mill, the combination of a bearing member, means for yieldably supporting said bearing to resist its lateral displacement, a shaft having its upper end journaled on said bearin member, a receptacle Within which the ower end of said shaft depends, a roll carried by said lower end of the shaft to coperate with the inner wall thereof, and means for yieldably supporting said receptacle against lateral displacement.

2. In a crushing mill, the combination of a bearing member, means for yieldably supporting' said bearing to resist its lateral displacement, a shaft having its upper end journaled on said bearing member, a receptacle within which the lower -end of said shaft depends, a roll carried by said lower end of the shaft to cooperate with the inner wall thereof, and means for yieldably supporting said receptacle against lateral displacement, said receptacle being suitably mounted to rock'from' side to side about a fixed point below the bottom of said receptacle.

8. In a crushing mill, the combination with a pivot, of a receptacle resting thereon and capable .of rocking in all directions about said pivot as a center, a shaft depend'- ing into sald receptacle, a roll mounted on the depending end of said shaft andl coperating with the inner lateral wall of said receptacle, means for resiliently supporting said receptaclefagainst lateral displacement about its pivot, and means for suspending the upper end of said shaft.

4. In a. crushing mill, the combination with a pivot, of a receptacle resting thereon and capable of rocking in all directions about said pivot as a center, av shaft depending into said'receptacle, a-roll mounted on the depending end of said shaft and cooperating with the inner lateral wall of said receptacle, means for resiliently supporting said receptacle against lateral displacement about its pivot, and means for suspending the upper end of said shaft, said means including a fixed support, a bearing member movably mounted thereon, and a pulley journaled on said bearing member and having said shaft suspended therefrom.

5. In a crushing mill,l the combination of a fixed frame, a receptacle yieldably supported in said frame, a bearing, a shaft having its upper end journaled on said bearing, a roll carried by the lower end of said shaft and operating within said receptacle, a supporting member for said bearing, and means for suspending said supporting member from said frame, said suspending-means being adapted to permit said bearing to'be shifted laterally during the gyratory movements of the roll within the receptacle.

6. In a crushing mill, the combination of a frame, bolts depending from said frame, a ring support suspended by said bolts, a

bearmg carried by said ring, a shaft having its upper end journaled on said bearing, a

lroller mounted on the lower end of said shaft, and a receptacle yieldably mounted insaid frame and Varranged to have its inner wall coperate with the roll on said shaft.

7. In a crushing mill, a fixed frame, a bearing member carried thereby, a pulley journaled on Said bearing member, a shaft depending from said pulley and having one end pivotally supported thereby, a roll mounted on the lower end of said shaft, a post carried by said frame and having a rounded bearing surface, a receptacle having a centrally disposed socket with a bearing surface conforming to t-he uppersurface of said post, and means for yieldably supporting said receptacle from said frame to prevent undue lateral movement about said post.v f

8. In a crushing mill, a resiliently mounted head, a shaft depending therefrom, a roll suspended on said shaft, a receptacle into which said roll depends, and means for resiliently supporting said receptacle against i lateral displacement.

9. In a crushing mill, a swingingly mounted head, a shaft depending therefrom, a roll suspended on said shaft, a receptacle within which said roll operates, and means for yieldably supporting said receptacle against lateral displacement.

HORACE L., KENT.

Witnesses:

E. KNIGHT, M. G. CRAWFORD. 

